Device for holding drills for sharpening



April 20 1926. 1,582,014

J. w. KENDALL DEVICE ron HOLDING DRILL'SIFOR sixvnrurne Filed 'sepa 24 1924 jatented Apr. 2.0, i926.

UNITED sTA'iEs PATENroi-Ficl JAMES W. .KENDLL ,0F ST.I.OUIS, MISSOURE, .ASSIGNOR OF ONE-HALF TO JAMES Il.

v BARNGROVE, OF ST. LOUIS, IVIISSOURI. i

DEVICE FOR HOLDING DRILLS FOR SHARPENING.

Application :tiled September 24, 1924. Serial No. 739,539.

To all iff/:0m may concern.'

Be it known that I, JAMES lV. KENDALL,

a citi-:cen ol the United States'. residing at St. Louisls; ssouriyhave invented new and useful Devices for Holding Drills lfor Sharpening, of which the following` is a speciiicatioii. p l

This invention relates to a device t'or holding; drills for sharpening. i

it is 4well known that considerable dniiculty is encountered in sharpening .sinall drills. rl`he diliiculty arises in part troni the fact that. for best results, the sharpened end of the drill inust be forined exactly on the axis of the drill. necessary to bevel the eiidsof the drill .lips with precision and uniformity. In the case of sinall drills it has been diiiicult to hold the drills in proper adjustment 'during the grii'idingg and sharpening voperation and it has heen nearly impossible to grind to shape the ends ol' the drill lips to forni the sharpened point properly on the axis of thedrill. At each succeeding sharpening' operation it is necessary to adjust the drill in a slightly different position from the preceding sharpeniiip' operation7 due to the twisted or spiral formation of the drill lips.

in object of the present invention .to provide a device or machine ycomprising` ineens for adjusting drills even of the sinallest size in a holder, and iiieans for iirnily in position to present ingr t the end of the drill so that when the he vholder To obtain this result it is L SllPpOl L- lips are sharpened 4by an abrading' device both lips of the drill'will vbe beveled at exactly the saine angle forming a point exactly on 'the axis of the drill.

Another object of the invention ii to provide a device or iiiachiiie of the character mentioned in which the degree otangularity at which the drill will be sharpened inay loe varied as desired in order to permit use of the device or machine in sharpeningY drills or different types.

Various other objects and advantages of the invention will appear troni the i'ollowing description. reference being inade to the drawing in which Fig'. l is a plan view of a preferred forni e invention.

.tween the plates 5.

.F 2 is a side elevation with one of the parts broken away.

Fig. 3 is a rear elevation.

l is an end elevation. 55

Fig'. 5 is a view showingv parts of the device in section and iii the positions they occupy during the operationor" adjusting the drill inthe holder.

Fig. G is a view showing the device -by `which the drill holder is adjusted kin its support to presentA the point ot'l thep'drill properiy for the sharpening operation.

To the base Ai a wall 2 is attached. A plate 3 is secured tothe wall 2 near one end there- 65 oi and supports a pair of parallel straight edge inenibers fl. A lpair of plates 5 have i their adjacent edges betweenthe straight edge nieinbers t and forni a tapering space orcliannel G. A stop guide 7 'is secured to 70 'the base l parallel with the straight edges 4. The drill. holder comprises a tube 8 designed and adaptedto support collets or chucks 9 oip4 diiierent sizes, and also to support a. draw spindle `l() which engages the'75 collets or chucks 9. 'When itis desired *to` sharpen a `drill of any size, within the capacity of the device, the collet or chuck 9 of the proper size for the drill to he sharpened is selected, and` with the drill in it, is placed in the ,holder 8. The draw spindle l0 is then tightenec'l suiiiciently to allow ythe drill to turn with considerable rictional resistance, and with the end of the vdrill `soine distance `beyond the end ofthe chuck. The drill 'holder is then placed `across the stop guide 7 and the point of the drill is placed within lthe tapering space "6 between the plates 5. The drill holder and the drill are then nioved toward the tapered end of the space G until the kdrill is felt to wedge be- During this movement the holder is turned back and li'orth slightly until the drill is yfelt to coine to rest within the narrowest part of' the space 6 to which 95 itcan inove. lVhenthe drill vis properly located in the inaiiner just described the holder is turned yto the right relative to the.y opere ator until the pinll supported by a disc 12 rigid on the holderabuts againstthe up- 100 per edge of the stop guide 7. 'Next the holder is pressed toward thewall 2 until the chuck 9 abuts against the straight edges 4. 'lhen the drill holder is moved to carry the point of the drill out through the wide end ot the space. (3 and placed in the sleeve 13, one end oi which is rigid in a support l-t and the opposite end orp which is split as shown at 15. The split end of the sleeve 13 is mounted in a clamping device comprising two members 16 connected by one end and separate at the other end. A screw 17 extends through the upper member 16 and screws into the lower member 16 and is provided with a lever 18 whereby it may be tightened and loosened. After the holder is placed in the sleeve 13 it is turned until the pin 11 enters one of the holes 19 in a disc 2O rigid on the outer end ot the sleeve 13. Next, the lever 1S is operated to tighten the clamp 1G and thereby clamp the split end of the sleeve 13 upon the holder. In this position the end ot the drill extends slightly beyond the wall 2 and in exactly the right position so that when the extended portion is removed one side ot the drill will be sharpened properly with respect to the drill lips. The sharpening Operation may be performed by use of an oil stone 21. YVhen the drill holder is in proper p sit-ion the end of the chuck rests against a rounded stop 2Q.

After one side of the drill has been sharpened the screw 17 is loosened to permit partial withdrawal of the holder which is then turned to place the pin 11 in the other hole 19 which presents the other lip of the drill in proper position to be. sharpened.

The drill support is mounted upon a plate Q3 having one end connected to a pivot 2e, the axis of which is in alinement with the axis of the rounded stop 22. The opposite end of the plate 2?) has a. curved slot 25 through which a screw 26 passes into the base 1. By releasing the screw 26 and turning the plate 2a to change the radial position of the sleeve 13 with respect to the axis ot the stop 22, the angularity of the. sharpened end of the drill may be varied as desired and the machine may be adjusted to sharpen drills ot different types.

From the 'foregoing it will be seen that my invention obtains all of its intended objects and purposes in a. highly etiicient and satisfactory manner and that by its use the smallest of drills may be. accurately and properly sharpened and used repeatedly. The construction, arrangement and relationship of the parts may be varied in numerous particulars and within equivalent limits without departure from the nature and principle of the invention. do not restrict myself unessentially, but- That I claim and desire to secure by Letters Patent is:

1. A device of the character described comprising a drill holder, a support holdileeaol-i ing said drill holder rigidly in each of two adjusted positions, and means for engaging and holding a drill in said holder when said holder it turned to a position in which the sides of vthe drill point extend beyond the drill holder in a definite. predetermined relationship thereto.

2. A device of the character described comprising a guide plate for abrasive material, a drill holder, means tor adjusting a lip drill in the drill holder in a position in which the sides of the drill point occupy a delinite predetermined relationship to the drill holder, and means for supporting the drill holder rigidly in each ot two positions to present the sides of the drill point alternately in the same relationship to said guide.

3. A device of the character described comprising a guide for abrasive material and having a hole therethrough, a drill holder, means for adjusting a lip drill in said holder in a predetermined adjustment, and means 'for rigidly supporting said holder in one position in which the end of the drill extends through said hole at angies for sharpening first one lip and then the. other lip ot' the drill leaving a sharpcned point exactly on the axis of the drill and in the plane ot the surface of said guide.

Li. A device of the character described comprising a guide :tor abrasive material and having a hole therethrough, a drill holder, means tor adjusting a lip drill in said holder in a predetermined adjustment, means forrigidiy supporting said holder in one position in which the end of the drill extends through said hole at angles for sharpening first one lip and rthen the other lip of the drill leaving a sharpened point exactly on the axis of the drill and in the plane ot the surface of said guide, and means for holding said supporting means in different adjustments to support said drill holder in different angular positions relative to said guide.

5. A device of the character described comprising a guide stop plate for abrasive material and having a hole therethrough, a drill holder, means for adjusting a drill in said holder in a position in which the drill extends a predetermined measured distance beyond the end of the holder, and means for locking said drill holder in each ot two positions in each of which one ot the lips ot the drill extends through said hole beyond said guide stop.

G. A device of the character described comprising a guide stop plate for abrasive material and having a hole therethrough, a drill holder, means 'lor adjusting a drill in said holder in a position in which the drill extends a predetermined measured distance beyond the end of the holder, means for locking said drill holder in each of twopositione` in each of 'which one of the lips of the drill said hole beyond said guide stop alternately in alternate adjustments of the drill holder, and means for securing said drill holder in each of said two positions.

8. A device of the character described comprising a guide stop for abrasive material and having a hole therethrough, a drill holder,a support for supporting said drill holder drill extend through said hole beyond said guide stop alternately in alternate adjustments of the drill holder, means for securingr said drill holder ineach of said two positions, and means for securing said support in position to support said drill holder in different angular positions relative to said guide stop.

9; A device of the character described comprising a drill holder for lip drills, means for securing a drill chuck with a drill in it in connection with said drill holder, and means for effecting adjustmentv of lip drills of'diiferent sizes in predetermined positions in saidk drill holde 10. A device of the character described comprising a drill holder, aA guide stop for abrasive material and having a hole therethrough for the end of a drill in said holder, a sleeve in which said drill holder may be mounted, and a latch device preventing said sleeve from turning from either of two adj ustments in said sleeve while the end of the drill extending through said hole is sharpened.

11. A device of the character described comprising a drill holder, means for adjusting a drill in said holder in a position in which the drill extends a predetermined measured distance beyond the end of the holder, a guide stop for abrasive material and having a hole therethrough for the end of a drill in said holder, a sleeve in which said drill vholder may be mounted, a latch device preventing said sleeve from turning from either of two adjustments in said sleeve while the end of the drill extending through said hole is sharpened, anda clamping device holding said drill holder from longitudinal displacement iii said sleeve.

means for adjusting a drill in said in position inV which kthe lips oi' the drill extend through in position in which the lips of the 12. A y.device -ot the :character described comprising a tubular drill and chuclrholder, means for securing a drill and chuck in'said holder, means for measuring the distance of projection of the ldrill beyond the holder, means for turning said holder to a desired position, and means for preventing the drill `from turning with `the holder. p

13. A device of the character described comprising a rotative and longitudinally movable drill holder, means for measuring thedistance of projection of thedrill beyond the holder, means for holdinga drill in said holder, and a device for engaging and holding the drill from turning and from longitudinal movements when said holder is turned and moved longitudinally.

14. A device ot the character described comprising a rotative yand longitudinallyV means for `holding 'a device 'for engaging movable drill holder,

drill `in said holder, a. and holding the drill from turning and from longitudinal movements when said holder is turned` and moved longitudinally, and means for stopping turning movements of said holder when said holder isin a predetermined position relative to said drill. v

15. A device of the character described comprising a rotative and longitudinally movable drill holder, means for holding a drill in said holder, a device for engaging and holding the `drill from turning and from longitudinal movements when said holder is turned and moved longitudinally, and means for stopping longitudinal movements of said holder when said holder isin a` predetermined v position relative to said drill.

16. A device of the character described comprising a rotative and longitudinally movable drill holder, means for holding a drill in said holder, a device for engaging and holding the. drill from turning and from longitudinal movements when said holder is turned and moved longitudinally, and means for stopping both turning and longitudinal movements of said holder when said holder is in a predetermined position relative to said dril 17. A `device of the character described comprising a drill holder, means for ing lip drills of different sizes in said holder with the ends of said drills extending the same distance beyond on the extended ends having the same relationship to the holder, and means for supporting the holder in each of two positions in which the lips of the drill are valternately in the same position.

18. A device of the character described comprising a drill holder, means for adjusting lip drills of different sizes in said holder with the ends of said drills extending the same distance beyond the holder and the lips on the extendedends having the same relaadj ustthe holder and the lips tionship to the holder, means for supporting the holder in each of tivo positions in which the lips of the drill are alternately in the same position, and a stop guide for abrasive material and having a hole therethrough for the end of the drill.

19. A device of the character described comprising a drill holder, means for supporting` said drill holder in each of tivo positions, and means for adjusting lip drills of different sizes in said holder with the ends of said drills extending the same distance beyond the holder and the lips on theI eX- tended ends having the same relationship 'to the holder.

S20. A device of the character described comprising` Y porting said drill holder in each of tivo positions, means for adjusting lip drills of different sizes in said holder with the ends of said drills extending the same distance bea drill holder, means Jr`or supe yond the ends having` the same relationship to the holder, and a stop guide l'or abrasive material and having a hole therethrough for the end of the drills in said holder.

21. A device of the character described comprising a drillholder, means for supporting said drill holder in each of tivo positions, means for adjusting lip drills of' different sizes in said holder with the ends of said drills extending theV same distance bevond the holder and the lips on the extended ends having the. same relationship to the holder, a stop fluide for abrasive material and having a hole therethrough for the end of the drills in said holder, and means for holding said supporting means and thereby said drill holder in diierent positions relative to said stop guide.

JAMES lV. KENDALL.

holder and the lips on the extended' 

